在上世纪之交，电池驱动的汽车成为城市里的街道一景，因为它们行驶安静而且不排放有毒烟气。

At the turn of the century battery-powered vehicles were a common sight on city streets, because they were quiet and did not emit any noxious fumes.

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在世纪之交这两类能力回报增长的放缓则很有可能是由于发生在上世纪90年代末的高校扩招。

The turn of the century saw a slowing down of the reward to both the observed and unobserved skills, due largely to the college expansion program that occurred at the end of the 1990s.

youdao

So, this all starts, in terms of putting it in its historical context at the turn of the Century, we said we'd start right in on the 20th Century of where chemistry was.

从历史的观点来看,这些都起源于,上个世纪之交,我们说我们从。

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